Piston.



I No. 876,853. PATENTED JAN. 14, 1908.

P. A. WILLE.

PISTON.

APPLICATION FILED JUNE 26. 1907.

" o If W/TNESSES INVENTOI? Z PczaZ J5. 77 Z'ZZ6:

I use.

PAUL ALTON WILLE, OF NEW YORK, N. Y.

rrs'ron.

Specification of Letters Patent.

Patented Jan. 14, 1908.

To all whom it may concern:

Be it known that I, PAUL ALTON WILLE, a citizen of the United States, and a resident of the cit of New York, borough of Brooklyn, in the county of Kings and 'State of New York, have invented a new and Improved Piston, of; which the following is a full,'clear, and exact description.

This invention relates to certain improvements in pistons adapted for use 1n engines, umps and the like, and especially adaptable in connection with cylinders which have become worn or irregular through I Particularly in internal combustion engines the cylinder often becomes gouged or worn out at one -side thereof, due to the thrust of the iston, and the cylindrical packing rings no onger fit the wall of the cylinder, thus permitting of an escape of the gases to the rear side of the piston.

My im roved piston may be manufactured in t e form illustrated, or an old and worn iston having the ordinary packing rings t ereon may be readily modified to-incorporate my invention. The iston as thus constructed 'or modified will fit a cylinder with any irregularity and take on the form of the cylinder and fit the particular curvature thereof. The packing of the piston may be placed in osition while the piston is Within the cylin er, and may be inserted to hold the flexible packing band in engagement with the cylinder with any desired degree of compactness.

The invention consists in certain features of construction and combinations of parts, all of which will be fully set forth hereinafter and particularly pointed out in the claims, Y

Reference is to be had to the accompanys ing drawings, formin a part of this specification, in' which simi ar characters of reference indicate corresponding parts in all the figures, and in which Figure 1 is a longitudinal section through a cylinder and piston, the latter being constructed in accordance .with my invention;

Fi 2 is a longitudinal section through an or inary form of piston adaptable for modification to inco orate my invention therein; and Fig. 3 is a ongitudinal section through the iston shown in Fig. 1-after having been m0 fled i preparation of the incorporation Of my invention.

The cylinders of umps and engines, particularly those use in connection with pis Application filed June 26. 1907. Serial No. 380-902. I

tons pivotally connected to their piston rods, often become gouged or worn out along one side thereof, due to the side thrust of the pistons, and as the packing rings ordinarily employed upon istons are cylindrical in form, the insertion of new packsteam or gas, and toward the crank, the resistance to the movement of the piston rodv 14 is not in a direct line axially with the cylinder, and, therefore, a side thrust is glven to the iston which causes it to engage with the cy inder with greater force upon one side than upon the other. The same is true when the piston is employed in a ump, only the greatest side thrust is exerte when the piston is returning to eject the contents of the cylinder. To construct the piston so as to fill out these unevennesses worn in the cylinder, I provide a detachable cap 15 of the full size of the piston and com rising a simple circular plate. The to of the cylinder is provided with an annu ar groove 16 intermediate the ends thereof and having one side thereof closed bythe plate 15.

Within the annular groove I provide an annular band 17, preferably formed of thin copper and of a length considerably greater than the length of an ordinary piston The copper band at one end thereof is provided wlth an inwardly-directed flange 18 which fits against the shoulder at one end of the annular recess, and the other end of the band lies closely adjacent the plate 15. In the annular recess between the co per band and the body of the piston I provi e a filling material 19, of asbestos fiber, steel Wool, or any other suitable.non-combustible, resilient material. This fillingmaterial is, insertedafter the band 17 is laced in'posltion. and before the plate 15 is f stened in'place. The filling material is tamped in until the band is forced outward a ains't the wall of the cylinder to fill all of t e inequalities and unevennesses thereof, the sheet of copper forming the band being readily bent to the desired osition by internal pressure. The cap or endiiplate is then placed in position and secure thereby any suitable means, as, for instance, screws 20, and the piston is ready for use.

The piston may be constructed as above described for use in new engines, but is especially adaptedfor use in engines which have become worn to a considerable extent. The

I piston may be readily constructed from an old and common form of piston, as, for-instance, that illustrated in Fig. 2. If the cylinder in which the piston illustrated in t is figure becomes so Worn that the piston rings 21 no longer fit the cylinder due to the irregularities in the form of the latter, I remove the piston from the cylinder and saw ofl" the end portion 15 to form the plate illustrated in Fig. 3. The annular flange 22 lying between the two piston rings is thus broken away or removed in any other suitable manner, and the parts then assume the form illustrated in Fig. 3. A copper band of the type illustrated in the piston in Fig. 1 is then secured about the annular recess formed b the removal of the piston rings and annu ar flange 22, the packing inserted, and theplate 15 secured in place to form the piston constituting my invention and illustrated complete in Fig. 1.

Various changes in the construction may be made Within the scope of the appended claims without departing from the spirit of my invention.

Having thus described my invention, I claim as new and desire to'secure by Letters I Patent:

1'. A piston having an annular recess in the body-portion thereof, a thin sheet metal 7 40 hand forming the. outer wall of said recess,

a resilient packing in engagement with the rear side of said band, and detachable means secured to the body of said piston for closing the end of said recess and retaining the packing in position.

2. A piston having an annular recess in. the bodyv portion thereof, a thin sheet metal band forming the outer Wall of said recess, a

packing in engagement with the rear side of said band, and a plate forming the end of the piston and closing the end of said annular recess.

3. A piston having an annular recess in the body portion thereof, a thin sheet metal band forming the outer Wall of said recess, a packing in engagement with the rear side of said band, and a detachable plate forming the end of the piston and closing the end of said annular recess. a 4. A piston having a detachable plate forming the end thereof and having an an:

' irrespective of the irregularities in the latter.

In testimony whereof I' have signed my name to this specification in the presence of two subscribing Witnesses.

PAUL ALTON WILLE.

Witnesses:

GEo. H. WELLs, J. GEORGE SUSTMANN. 

